Analysis and Design of Repetitive controlled Inverter System with High Dynamic Performance

Although repetitive controlled PWM inverters present an excellent steady-state performance, they cannot present a good dynamic performance under non-periodic disturbances. To resolve this problem, this paper analyzes the error characteristic of pulse width modulation (PWM) inverter system controlled by repetitive controller and voltage-current dual-loop controller, pointes out the necessary condition for repetitive controlled system to acquire good dynamic performance, and proposes a simple and effective control strategy to amend the demerit of conventional voltage-current dual-loop controlled inverter for excellent performance. At last, simulation and experiment results in a TMS320LF2407 controlling 3 kVA UPS are provided to testify the above conclusion